In the following three dimensional structure of $\mathrm{CH}_4$, the bonds are labelled as $W, X, Y$ and $Z$…

In the following three dimensional structure of $\mathrm{CH}_4$, the bonds are labelled as $W, X, Y$ and $Z$. The bonds projecting out of the plane are:
  1. X,Y
  2. W, Z
  3. X, Z
  4. W, Y

Solution

The bonds that are projecting out of the plane are $W$ and $Z$.
Here, normal lines $(-)$ always shows the groups, lying in the plane of the paper. Solid-wedge shows the bond projects out of the plane of paper and towards the observer. Dashed-wedge $(|||| \mid)$ also, shows the bond projecting out of the plane of paper but it is away from the observer.

Asked in: AP EAMCET 2018 (24 Apr Shift 1)

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